<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
</head>
<body>
<canvas id="hacker" width="500" height="800"></canvas>
</body>
<script type="text/javascript">
window.onload = function() {
var kacker = document.getElementById("hacker");
var width = hacker.width = screen.width;
var height = kacker.height;
var ctx = hacker.getContext('2d');
var num = Math.ceil(width / 10);
var y = Array(num).join(0).split('');
var draw = function() {
ctx.fillStyle = 'rgba(0,0,0,.05)';
ctx.fillRect(0, 0, width, height);
ctx.fillStyle = '#0f0';
ctx.font = '10px Microsoft YaHei';
for(i = 0; i < num; i++) {
var x = (i * 10) + 10;
text = String.fromCharCode(65 + Math.random() * 62);
//console.log(text); 用来检测 text 的值
var y1 = y[i];
ctx.fillText(text, x, y1);
if(y1 > Math.random() * 10 * height) {
y[i] = 0;
} else {
y[i] = parseInt(y[i]) + 10;
}
}
}
Run();
function Run() {
Game_Interval = setInterval(draw, 100);
}
}
</script>
</html>
